Window blind



April 10, 1951 c. v. BERGSTROM 2,548,512

WINDOW BLIND Filed April 10, 1948 IN V E TOR.

Y Car/ l/Bergszmm ga 0. 'Iwa Att} Patented Apr. 10, 1951 UNITED STATESPATENT W INDOW BLIND Carl V. Bergstrom, Santa Monica, Calif.

Application April 10, 1948, Serial No. 2 0,259

8'Claims. 1

The invention relates to window blinds.

The general object of the invention is to provide a window blind whichmay be used in place of the more complicated, more expensive and lesseasily cleaned Venetian blind.

A further object of the invention is to provide an all metal blind ofsimple and inexpensive construction in which the louvers are integralwith or rigidly connected to longitudinally extending corrugated stripmembers which oncontraction or expansion will move thelouvers to open orclosed position.

A further object of the invention is to vprovide in a blind of thecharacter above described means for rendering a portion of the blindinoperative while allowing another portion to be opened and closed.

A further object of the invention isto provide a blind of the characterdescribed which may be operated from either the top or bottom of thewindow.

A further object of the invention is to provide a blind of the characterdescribed in which the louvers may be so connected as to be moved in oneinstance to a closed position on the stretching of the anchoring meansand in another instance to an open position when said anchoring means isstretched.

The invention further consists in the several features hereinafterdescribed and more particularly defined by claims at the conclusionhereof.

In the drawings:

Fig. l is a composite front elevation view of a blind embodying theinvention in which the left hand half of the figure shows the blind inan open position and the righthand half of the figure shows the blind ina closed position;

Fig. 2 is detailed elevation view of the upper portion of a blindembodying the invention provided with means for operating the same fromthe top of the blind;

Fig. 3 is a composite view of a blind embodying the invention in whichthe right and left hand halves of the blind are similar to Fig. 1 andillustrating how only a portionof the blind may be opened and closed;

Fig. 4 is an enlarged composite elevation view of a portion of a blindembodying the invention, the left hand half showing the blind in an openposition and the right hand half showing the blind in a closed position;

Fig. 5 is a detailed vertical sectional vie taken on the line 5-5 ofFig. 4;

' Fig. 6 is a detailed vertical sectional view taken on the line 66 ofFig. 4;

Fig. 7 is an enlarged composite elevation view of a portion of a blindembodying the invention 1 in which the left hand half is in a closed.position and the right hand half .is in an open po'-,

sition;

Fig. 8 is" a detailed vertical sectional view taken on the line 8-8 ofFig. 7;

Fig. 9 is a detailed vertical sectional view taken on the line 9--9 ofFig. 7;

Fig. 10 is a detailed vertical sectional view' taken on the line l0l0 ofFig. 4.

Referring to Figs. 1 to 6 of the drawings, the numeral 12 designates awindow'frame and I3 figures, the whole blind is formed from a singlesheet of suitable sheet metal, such as a suitable.

aluminum alloy, which is subjected to punch pressing operations to slitit transversely at spaced distances to form the louvers and to form thecorrugations l8 in the side portions of'said sheet, so that after thepressing operation, the

louvers I! extend at an angle to the corrugated side portions as shownin Fig. 5 and are in an open position, so that when a stretchingpressure is imposedon the side portions I6 by pulling outwardly on oneend of the sheet, the louvers I! will assume the closed position shownin Fig. 6. The sheet may, as shown in Fig. 1, be anchored at its topportion 14 by screws I9 to the upper portion of the window and benormally held in an open position by studs Z-O-that engage in holes 2|in the bottom portion l5 as shown at the left hand halves of Figs. 1 and3 and be held in an open position by disengaging it or slipping it offof the studs 20 and pulling it down until the holes 2| may be slippedover studs 22 on the window frame 12 .as shown at the right hand halvesof Figs. 1 and 3 or conversely the sheet may be anchored at its bottomportion IE to the window frame and moved and held in its differentpositions by cords 23 secured to the top portion [4 extending overguides 24 on the window frame and connected to a handle member '25provided'with a series of notches" 2 6, as shown in Fig. 2, any one ofwhich may engage with a stud (not shown) secured-to the window frame.

Where only partial operation of the blind is desired, the blind may beanchored to the win- OFFICE I j dow frame midway of its length, forexample,

as shown in Fig. 3 by screws 21 securing its upper half to the Windowframe as shown in Fig. 3.

Where the blind is very wide, the louvers may be connected intermediatetheir ends by rivets 28, spot welding, or in other suitable manner toone or more longitudinally extending corrugated strips 29 as shown inFigs. 4 and 10, or where it is not desired to form the blind in onepiece, separate metal sheets may be used :to form the louvers I1 andstrips, similar to the strips 29, may form the sides of the blind frameand carry the louvers as shown in Fig. 10, so that when thesestrips areflexed, the louvers will be movedito a' closed position as shown in Fig.6.

Instead of pressing or connecting'the' louvers to their corrugatedcarrying stripssoxthat they are in an open position in the unstretchedcondition of the corrugated side strips, they may, as

shown in Fig. 8, be disposed to assume a closed position and to 'move toan open position as shown in Fig; 9 when the corrugated side portionsare stretched? Where the-corrugated strips are separate, theymay befor-med of a different,- metal from the louvers, for example, fiatspring steel stripsn It is to be noted that so long a the-niarginalcorrugated'sid'e strips or'portions IG are properly anchored at one end,the trans-verseportion- M or I5 at thisanchoredtend is not absolutelyessential. From the above it will'be-noted that l have provided a blindof'simple andinexpensive'construction and one which may be easilycleaned either by a vacuum cleaning or by taking it down and washing itwith a pressure spray.

It'is also to be. noted that while the corrugated part of the blindmaybe metal, it-isnot necessarily limited thereto" as any suitablematerial such' as a plastic or rubber composition which has therequisitespring tension maybe used. in

the corrugated part oflthe blind.

I desire it to be understood that'this invention isnot'to be limited toany particularform or arrangement of partsexcept in so far as such.limitationsare includedin the claims.

What I'claim as my. invention is: v

, 1 In a window blind; the combination with marginal contractible and-expandible corrugated side 'strips or" flexible metal, ofaseriesofspaced louvers anchoredto said strips-betweenithe crests ofrthecorrugations of said stripsand movable by said strips-to difierentpositionslon the stretching 1 orcontractionof said=stri1esare-contracted and extend at an acute angle to the sides .of the.corrugations of said strips in theirclosed position when said sidestrips are stretched;

6. A window blind in accordance with claim} wherein the louvers extendat an acute angle to the sides of the corrugations of said strips intheir closed position'when said sidestripsare contracted andextendlaterally at an'obtuse angle-to the sides of thecorrugationsof'saidstrips" in their open position when said side strips are;

stretched.-

7; In a=window blind, the combination with a window frame of marginalcorrugated side strips of resilient metal anchored at one of their endsto said-frame, aseries of-spaced louvers anchored to saidstrips-betweenthe crests of'their corrugations, and'means-for anchoring theoth'erends' of' said strips to said frame in stretched and un-' stretchedcondition.

8. A window blind in accordance with claim 7 wherein-theside' strips arealso anchored at" an intermediatepoint to the frame so that only-aportion of the blind is adapted to be moved onthestretchingand'unstretchingof the stripsfrom one end of saidframe;CARL V. BERG S'IROM;

REFERENCES CITED The. followingereferences are of record. in the file ofthispatent:

UNITED: STATES PATENTS Number Name Date 1,411,866 Morris -l Apr. 4,1922' 1,937,342 Higbie Nov. 28, 1933 2,093,093

Mongus Sept. 14, 1937'

